A Loyola University Medical Center psychiatrist is proposing a new subspecialty to diagnose and treat patients who suffer both depression and heart disease. He's calling it "Psychocardiology." In his most recent study, Angelos Halaris, MD, PhD, and colleagues found that an inflammatory biomarker, interleukin-6, was significantly higher in the blood of 48 patients diagnosed with major depression than it was in 20 healthy controls.